Hold down L1 and L2 while playing, then enter down, square, triangle, down, square, triangle, circle, X, R2, up, select.
These are all to be entered during gameplay
Canyon:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, UP, SELECT
Mine:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, RIGHT, SELECT
Mine tunnel:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, DOWN, SELECT
Junkyard 1:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, LEFT, SELECT
Junkyard 2:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, TRIANGLE, SELECT
Junkyard 3:- DOWN, SQUARE, TRIANGLE, DOWN, SQUARE, TRIANGLE, SQUARE TRIANGLE, RIGHT, O, SELECT
I hope they help you they sure helped me
down,square,triangle,down,square,triangle,O,X,R2,tri-angle,select
P.S.Hold L1 and L2 to do all cheats
In the Uptown level or level six there is a suicide booth. You will need the code of invinciblity (down, square, triangle, down, square, triangle, circle, x, R2, Triangle, select) then go in the suicide booth and press triangle, then you should come out invisible.